1. NAME▲

cpufreq-info - Utility to retrieve cpufreq kernel information

2. SYNTAX ▲

cpufreq-info [options]

3. DESCRIPTION ▲

A small tool which prints out cpufreq information helpful to developers and interested users.

4. OPTIONS ▲

  • -c --cpu <CPU>
         <CPU> number which information shall be determined about.
  • -e --debug
        Prints out debug information.
  • -f --freq
        Get frequency the CPU currently runs at, according to the cpufreq core.
  • -w --hwfreq
        Get frequency the CPU currently runs at, by reading it from hardware (only available to root).
  • -l --hwlimits
        Determine the minimum and maximum CPU frequency allowed.
  • -d --driver
        Determines the used cpufreq kernel driver.
  • -p --policy
        Gets the currently used cpufreq policy.
  • -g --governors
        Determines available cpufreq governors.
  • -a --related-cpus
        Determines which CPUs run at the same hardware frequency.
  • -a --affected-cpus
        Determines which CPUs need to have their frequency coordinated by software.
  • -s --stats
        Shows cpufreq statistics if available.
  • -y --latency
        Determines the maximum latency on CPU frequency changes.
  • -o --proc
        Prints out information like provided by the /proc/cpufreq interface in 2.4. and early 2.6. kernels.
  • -m --human
        human-readable output for the -f, -w, -s and -y parameters.
  • -h --help
        Prints out the help screen.

5. REMARKS ▲

You can't specify more than one of the output specific options -o -e -a -g -p -d -l -w -f -y.

You also can't specify the -o option combined with the -c option.

6. FILES ▲

 
Sélectionnez
/sys/devices/system/cpu/cpu*/cpufreq/
/proc/cpufreq (deprecated)
/proc/sys/cpu/ (deprecated)

7. AUTHORS ▲

 
Sélectionnez
Dominik Brodowski <linux@brodo.de> - author
Mattia Dongili<malattia@gmail.com> - first autolibtoolization

8. SEE ALSO ▲

cpufreq-set(1), cpufreq-aperf(1)